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Michael R. Bloomberg, Mayor Cas Holloway, Commissioner

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New York City 2009 Drinking Water Supply and Quality Report


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Ashokan Reservoir

NEW YORK CITY 2009 DRINKING WATER SUPPLY AND QUALITY REPORT The New York City Department of Environmental Protection (DEP) is pleased to present its 2009 Annual Water Supply and Quality Report. This report was prepared in accordance with Part 5-1.72 of the New York State Sanitary Code (10NYCRR), and the National Primary Drinking Water Regulations, 40 CFR Part 141 Subpart O, of the United States Environmental Protection Agency (EPA), which require all drinking water suppliers to provide the public with an annual statement describing the water supply and the quality of its water.

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4

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Croton Water Filtration Plant

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Hillview Reservoir

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City Water Tunnel No. 3

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5


Old Water Meter and New Water Meter with AMR Transmitter

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Groundwater System Enhancements

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6

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Croton Water Filtration Plant

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Fluoride

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Operational Changes >H[LYMYVT[OL*YV[VUHUK.YV\UK^H[LY:`Z[LTZ^HZ UV[ MLK PU[V KPZ[YPI\[PVU MVY [OL LU[PYL   JHSLUKHY `LHY 6WLYH[PVUHS PUMVYTH[PVU MVY [OL .YV\UK^H[LY :`Z[LTJHUILMV\UKH[www.nyc.gov/dep/groundwater;OL THW VU [OL PUZPKL MYVU[ JV]LY YLWYLZLU[Z [OL *H[ZRPSS +LSH^HYL*YV[VUHUK.YV\UK^H[LYZLY]PJLHYLHZ;OPZ THWKLWPJ[Z[OL*YV[VUHUK.YV\UK^H[LYZLY]PJLHYLHZ ^OLU[OL`HYLPUVWLYH[PVU

Drinking Water Quality +,7»Z ^H[LY X\HSP[` TVUP[VYPUN WYVNYHT ¶ MHY TVYL L_[LUZP]L[OHUYLX\PYLKI`SH^¶KLTVUZ[YH[LZ[OH[[OL X\HSP[`VM5L^@VYR*P[`»ZKYPURPUN^H[LYYLTHPUZOPNO HUKTLL[ZHSSOLHS[OYLSH[LKZ[H[LHUKMLKLYHSKYPURPUN ^H[LYZ[HUKHYKZ

Drinking Water Sampling and Monitoring

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7


Water Main Project in Staten Island

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Test Results

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Lead in Drinking Water

5L^ @VYR *P[` ^H[LY PZ ]PY[\HSS` SLHKMYLL ^OLU P[ PZ KLSP]LYLKMYVT[OL*P[`»Z\WZ[H[LYLZLY]VPYZ`Z[LTZI\[ ^H[LYJHUHIZVYISLHKMYVTZVSKLYÃ&#x201E;_[\YLZHUKWPWLZ MV\UKPU[OLWS\TIPUNVMZVTLI\PSKPUNZVYOVTLZ<UKLY [OL MLKLYHS 3LHK HUK *VWWLY 9\SL 3*9 THUKH[LK H[[OL[HW SLHK TVUP[VYPUN PZ JVUK\J[LK H[ ZLSLJ[LK OV\ZLOVSKZSVJH[LK[OYV\NOV\[[OL*P[`0U IHZLK VU[OLYLZ\S[ZVM[OPZTVUP[VYPUN[OL [OWLYJLU[PSLKPK UV[L_JLLKÂ&#x203A;N3[OLLZ[HISPZOLKZ[HUKHYKVY(J[PVU 3L]LS MVY SLHK ;OL H[[OL[HW TVUP[VYPUN YLZ\S[Z HYL HSZV WYLZLU[LK PU H ZLWHYH[L [HISL PU [OPZ 9LWVY[ ([

8

0M`V\^PZO[VSLHYUTVYLHIV\[SLHKPUKYPURPUN^H[LY [LZ[PUN TL[OVKZ HUK Z[LWZ `V\ JHU [HRL [V TPUPTPaL L_WVZ\YL PUMVYTH[PVU PZ H]HPSHISL MYVT [OL :HML +YPURPUN >H[LY /V[SPUL    VY H[ www.epa. gov/safewater/lead

Monitoring for Cryptosporidium and Giardia

0U   [OL *P[` Z[HY[LK H JVTWYLOLUZP]L WYVNYHT [V TVUP[VY P[Z ZV\YJL ^H[LYZ HUK ^H[LYZOLKZ MVY [OL WYLZLUJLVMCryptosporidiumHUKGiardia>OPSL[OLYL PZ UV L]PKLUJL [OH[ [OL PSSULZZLZ JY`W[VZWVYPKPVZPZ VY NPHYKPHZPZ OH]L ILLU H[[YPI\[LK [V [OL 5L^ @VYR *P[` ^H[LYZ\WWS`MLKLYHSHUK5L^@VYR:[H[LSH^YLX\PYLZ HSS ^H[LY Z\WWSPLYZ [V UV[PM` [OLPY J\Z[VTLYZ HIV\[ [OL WV[LU[PHS YPZRZ VM Cryptosporidium HUK Giardia *Y`W[VZWVYPKPVZPZHUKNPHYKPHZPZHYLPU[LZ[PUHSPSSULZZLZ JH\ZLK I` TPJYVZJVWPJ WH[OVNLUZ ^OPJO JHU IL ^H[LYIVYUL :`TW[VTZ VM PUMLJ[PVU PUJS\KL UH\ZLH


City Water Tunnel No.3 Shaft Construction

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-YVT 1HU\HY`  [V +LJLTILY    H [V[HS VM  YV\[PUL ZHTWSLZ ^LYL JVSSLJ[LK HUK HUHS`aLK MVY Cryptosporidium VVJ`Z[Z HUK Giardia J`Z[Z H[ [OL 2LUZPJV 9LZLY]VPY LMÃ&#x2026;\LU[Z HUK  YV\[PUL ZHTWSLZ ^LYL JVSSLJ[LK H[ [OL 5L^ *YV[VU 9LZLY]VPY LMÃ&#x2026;\LU[ :HTWSLZ ^LYL HUHS`aLK \ZPUN 4L[OVK  /= <: ,7( 6M [OL  YV\[PUL 2LUZPJV 9LZLY]VPY LMÃ&#x2026;\LU[ ZHTWSLZ Ã&#x201E;]L ^LYL WVZP[P]L MVY Cryptosporidium  [V VVJ`Z[Z3HUK^LYLWVZP[P]LMVYGiardia[V  J`Z[Z3 6M [OL  YV\[PUL 5L^ *YV[VU 9LZLY]VPY LMÃ&#x2026;\LU[ZHTWSLZMV\Y^LYLWVZP[P]LMVYCryptosporidium [VVVJ`Z[Z3HUK^LYLWVZP[P]LMVYGiardia [VJ`Z[Z3+,7»ZCryptosporidiumHUKGiardia KH[H MYVT   [V [OL WYLZLU[ HSVUN ^P[O ^LLRS` \WKH[LZ JHU IL ]PL^LK VU [OL +,7 ^LIZP[L H[! www.nyc.gov/html/dep/html/drinking_water/pathogen.shtml.

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9


New York City Drinking Water Quality Testing Results 2009 Detected Parameters PARAMETERS

NYSDOH MCL

CATSKILL/DELAWARE SYSTEM USEPA SOURCES IN DRINKING WATER MCLG # SAMPLES RANGE AVERAGE

CONVENTIONAL PHYSICAL AND CHEMICAL PARAMETERS $ONDOLQLW\ PJ/&D&2

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ORGANIC PARAMETERS Specified Organic Chemicals detected: 'DODSRQ —J/

Disinfection By-Products detected: %URPRFKORURDFHWLFDFLG —J/

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10

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Detected Parameters (continued) MICROBIAL PARAMETERS NYSDOH MCL

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Groundwater Service Area

Not Detected Parameters UNDETECTED CONVENTIONAL PHYSICAL AND CHEMICAL PARAMETERS $QWLPRQ\$UVHQLF$VEHVWRV%HU\OOLXP&DGPLXP&KURPLXP&\DQLGH)RDPLQJ$JHQWV/LWKLXP0HUFXU\1LFNHO1LWULWH6HOHQLXP6LOYHU7KDOOLXP*URVV$OSKD*URVV%HWD5DGLXP

UNDETECTED ORGANIC PARAMETERS Principal Organic Contaminants not detected: %HQ]HQH%URPREHQ]HQH%URPRFKORURPHWKDQH%URPRPHWKDQHQ%XW\OEHQ]HQHVHF%XW\OEHQ]HQHWHUW%XW\OEHQ]HQH&DUERQ7HWUDFKORULGH&KORUREHQ]HQH&KORURHWKDQH&KORURPHWKDQH &KORURWROXHQH&KORURWROXHQH'LEURPRPHWKDQH'LFKORUREHQ]HQH'LFKORUREHQ]HQH'LFKORUREHQ]HQH'LFKORURGLIOXRURPHWKDQH'LFKORURHWKDQH'LFKORURHWKDQH 'LFKORURHWKHQHFLV'LFKORURHWK\OHQHWUDQV'LFKORURHWK\OHQH'LFKORURSURSDQH'LFKORURSURSDQH'LFKORURSURSDQH'LFKORURSURSHQHFLV'LFKORURSURSHQH WUDQV'LFKORURSURSHQH(WK\OEHQ]HQH+H[DFKORUREXWDGLHQH,VRSURS\OEHQ]HQHS,VRSURS\OWROXHQH0HWK\OHQHFKORULGHQ3URS\OEHQ]HQH6W\UHQH7HWUDFKORURHWKDQH 7HWUDFKORURHWKDQH7HWUDFKORURHWK\OHQH7ROXHQH7ULFKORUREHQ]HQH7ULFKORUREHQ]HQH7ULFKORURHWKDQH7ULFKORURHWKDQH7ULFKORURHWKHQH7ULFKORURIOXRURPHWKDQH 7ULFKORURSURSDQH7ULPHWK\OEHQ]HQH7ULPHWK\OEHQ]HQHP;\OHQHR;\OHQHS;\OHQH Specified Organic Chemicals not detected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nspecified Organic Chemicals not detected: $FHQDSKWKHQH$FHQDSKWK\OHQH$FHWRFKORU$FHWRQH$FLIOXRUIHQ$PHWU\Q$QWKUDFHQH%HQWD]RQ%HQ]R>D@DQWKUDFHQH%HQ]R>E@IOXRUDQWKHQH%HQ]R>N@IOXRUDQWKHQH%HQ]R>JKL@SHU\OHQH D%+&E%+&G%+&%URPDFLO%XW\ODWH%XW\OEHQ]\OSKWKDODWHD&KORUGDQHJ&KORUGDQH&KORUREHQ]LODWH&KORURELSKHQ\O&KORURQHE&KORURWKDORQLO 'UDFRQLO%UDYR &KORUSURSKDP &KORUS\ULIRV 'XUVEDQ &KU\VHQH&\FORDWH'%'&3$ 'DFWKDO '&3$ WRWDOPRQR GLDFLGGHJUDGDWH SS·'''SS·''(SS·''7'LD]LQRQ'LEHQ]>DK@DQWKUDFHQH'LQ%XW\OSKWKDODWH 'LFKORUREHQ]RLFDFLG'LFKORURELSKHQ\O'LFKORUSURS'LFKORUYRV ''93 'LHWK\OSKWKDODWH'LPHWKRDWH'LPHWK\OSKWKDODWH'LQLWURWROXHQH'LQLWURWROXHQH'L1RFW\OSKWKDODWH 'LSKHQDPLG(QGRVXOIDQ,(QGRVXOIDQ,,(QGRVXOIDQVXOIDWH(QGULQDOGHK\GH(37&(WKRSURS(WULGLD]ROH)OXRUDQWKHQH)OXRUHQH···+HSWDFKORURELSKHQ\O+HSWDFKORUHSR[LGH LVRPHU% ···+H[DFKORUELSKHQ\O,QGHQR>FG@S\UHQH,VRSKRURQH0DODWKLRQ0HWKLRFDUE0HWK\O3DUDR[RQ0HYLQSKRV0*.LVRPHUD0*.LVRPHUE0ROLQDWH 1DSKWKDOHQH1DSURSDPLGHFLV1RQDFKORUWUDQV1RQDFKORU····2FWDFKORURELSKHQ\O3DUDTXDW3DUDWKLRQ3HEXODWH3HQGLPHWKDOLQ··3HQWDFKORURELSKHQ\O3HUPHWKULQ WUDQV3HUPHWKULQ3KHQDQWKUHQH3URPHWU\Q3URQDPLGH3URSD]LQH3URSR[XU %D\JRQ 3\UHQH77HUEDFLO7HUEXWK\OD]LQH7HUEXWU\Q··7HWUDFKORURELSKHQ\O7KLREHQFDUE 7ULFKORURELSKHQ\O7ULIOXUDOLQ9HUQRODWH

UNREGULATED CONTAMINANTS MONITORING RULE (UCMR) CHEMICALS NOT DETECTED $FHWRFKORUHWKDQHVXOIRQLFDFLG (6$ $FHWRFKORUR[DQLOLFDFLG 2$ $ODFKORU(6$$ODFKORU2$GLQLWUREHQ]HQH···KH[DEURPRELSKHQ\O +%% ···KH[DEURPRGLSKHQ\OHWKHU %'( +H[DK\GURWULQLWURWULD]LQH 5'; 0HWRODFKORU(6$0HWRODFKORU2$1QLWURVRGLHWK\ODPLQH 1'($ 1QLWURVRGLPHWK\ODPLQH 1'0$ 1QLWURVRGLQEXW\ODPLQH 1'%$  1QLWURVRGLQSURS\ODPLQH 1'3$ 1QLWURVRPHWK\OHWK\ODPLQH 10($ 1QLWURVRS\UUROLGLQH 13<5 ··SHQWDEURPRGLSKHQ\OHWKHU %'( ··SHQWDEURPRGLSKHQ\OHWKHU %'( 7HUEXIRVVXOIRQH··WHWUDEURPRGLSKHQ\OHWKHU %'( WULQLWURWROXHQH 717 

11


Footnotes

Definitions

 <:,7(:LJVUKHY`4*3!5@:+6/OHZUV[ZL[HU4*3MVY[OPZ WHYHTL[LY

Action Level (AL):

 =HS\L YLWYLZLU[Z 49+3 ^OPJO PZ H SL]LS VM KPZPUMLJ[HU[ HKKLK MVY ^H[LY [YLH[TLU[ [OH[ TH` UV[ IL L_JLLKLK H[ [OL JVUZ\TLY»Z[HW^P[OV\[HU\UHJJLW[HISLWVZZPIPSP[`VMHK]LYZL OLHS[OLMMLJ[Z;OL49+3PZLUMVYJLHISLPU[OLZHTLTHUULY HZHU4*3HUKPZ[OLJHSJ\SH[LKY\UUPUNHUU\HSH]LYHNL+H[H WYLZLU[LKHYL[OLYHUNLVMPUKP]PK\HSZHTWSPUNYLZ\S[ZHUK[OL OPNOLZ[VM[OLMV\YX\HY[LYS`Y\UUPUNHUU\HSH]LYHNLZ

;OLJVUJLU[YH[PVUVMHJVU[HTPUHU[^OPJOPML_JLLKLK [YPNNLYZ [YLH[TLU[ VY V[OLY YLX\PYLTLU[Z [OH[ H ^H[LY Z`Z[LTT\Z[MVSSV^(UL_JLLKLUJLVJJ\YZPMTVYL[OHU  VM[OLZHTWSLZL_JLLK[OL(J[PVU3L]LS

Maximum Contaminant Level Goal (MCLG):

;OLSL]LSVMHJVU[HTPUHU[PUKYPURPUN^H[LYILSV^^OPJO  +L[LYTPUH[PVUVM4*3]PVSH[PVU!0MHZHTWSLL_JLLKZ[OL4*3 [OLYL PZ UV RUV^U VY L_WLJ[LK YPZR [V OLHS[O 4*3.Z H ZLJVUK ZHTWSL T\Z[ IL JVSSLJ[LK MYVT [OL ZHTL SVJH[PVU HSSV^MVYHTHYNPUVMZHML[` ^P[OPU[^V^LLRZ0M[OLH]LYHNLVM[OL[^VYLZ\S[ZL_JLLKZ[OL 4*3[OLUHU4*3]PVSH[PVUOHZVJJ\YYLK  (J[PVU 3L]LS UV[ HU 4*3 TLHZ\YLK H[[OL[HW  ;OL KH[H WYLZLU[LKPU[OPZ[HISL^LYLJVSSLJ[LKMYVTZHTWSPUNZ[H[PVUZ H[[OLZ[YLL[J\YI-VYH[[OL[HWTVUP[VYPUNZLL[OLLead and Copper Rule Sampling at Residential Water Taps[HISL  ( 3HUNLSPLY 0UKL_ VM SLZZ [OHU aLYV PUKPJH[LZ JVYYVZP]L [LUKLUJPLZ

Maximum Contaminant Level (MCL):

;OL OPNOLZ[ SL]LS VM H JVU[HTPUHU[ [OH[ PZ HSSV^LK PU KYPURPUN^H[LY4*3ZHYLZL[HZJSVZL[V[OL4*3.ZHZ MLHZPISL\ZPUN[OLILZ[H]HPSHISL[YLH[TLU[[LJOUVSVN`

Maximum Residual Disinfectant Level (MRDL):

;OL OPNOLZ[ SL]LS VM H KPZPUMLJ[HU[ HSSV^LK PU KYPURPUN ^H[LY ;OLYL PZ JVU]PUJPUN L]PKLUJL [OH[ HKKP[PVU VM  /HYKULZZVM\W[VNYHPUZWLYNHSSVUPZJVUZPKLYLKZVM[^H[LY" H KPZPUMLJ[HU[ PZ ULJLZZHY` MVY JVU[YVS VM TPJYVIPHS IL[^LLUHUK PZTVKLYH[LS`OHYK^H[LY JVU[HTPUHU[Z  0MPYVUHUKTHUNHULZLHYLWYLZLU[[OL[V[HSJVUJLU[YH[PVUVM IV[OZOV\SKUV[L_JLLKÂ&#x203A;N3  6US` VUL ZHTWSL JVSSLJ[LK VU    MYVT H Z\IZ[P[\[L SVJH[PVU MVY ZP[L   ;\Y[SL )H`  OHK H ]HS\L VM Â&#x203A;N3HIV]L[OL(J[PVU3L]LSVMÂ&#x203A;N3

Maximum Residual Disinfectant Level Goal (MRDLG):

;OL SL]LS VM H KYPURPUN ^H[LY KPZPUMLJ[HU[ ILSV^ ^OPJO [OLYLPZUVRUV^UVYL_WLJ[LKYPZR[VOLHS[O49+3.Z KVUV[YLÃ&#x2026;LJ[[OLILULÃ&#x201E;[ZVM[OL\ZLVMKPZPUMLJ[HU[Z[V   6UL ZHTWSL JVSSLJ[LK VU   MYVT ZP[L  (Y]LYUL JVU[YVSTPJYVIPHSJVU[HTPUH[PVU  OHKHW/VM ^OPJOPZV\[ZPKL[OLVW[PTHSYHUNL;OL YLWVY[LKH]LYHNL]HS\LMVYW/PZ[OLTLKPHU]HS\L

 >H[LYJVU[HPUPUNTVYL[OHUTN3VMZVKP\TZOV\SKUV[IL \ZLKMVYKYPURPUNI`WLVWSLVUZL]LYLS`YLZ[YPJ[LKZVKP\TKPL[Z >H[LYJVU[HPUPUNTVYL[OHUTN3VMZVKP\TZOV\SKUV[IL \ZLKMVYKYPURPUNI`WLVWSLVUTVKLYH[LS`YLZ[YPJ[LKZVKP\T KPL[Z

Treatment Technique (TT):

( YLX\PYLK WYVJLZZ PU[LUKLK [V YLK\JL [OL SL]LS VM H JVU[HTPUHU[PUKYPURPUN^H[LY

90th Percentile Value:

;OL]HS\LZYLWVY[LKMVYSLHKHUKJVWWLYYLWYLZLU[[OL [O WLYJLU[PSL ( WLYJLU[PSL PZ H ]HS\L VU H ZJHSL VM  [OH[ PUKPJH[LZ [OL WLYJLU[ VM H KPZ[YPI\[PVU [OH[ PZ LX\HS[VVYILSV^[OL]HS\L;OL [OWLYJLU[PSLPZLX\HS  ;OPZ 4*3 MVY [\YIPKP[` PZ [OL TVU[OS` H]LYHNL YV\UKLK VMM [V [V VY NYLH[LY [OHU   VM [OL SLHK HUK JVWWLY ]HS\LZ [OL ULHYLZ[ ^OVSL U\TILY  +H[H WYLZLU[LK HYL [OL YHUNL VM PUKP]PK\HS ZHTWSPUN YLZ\S[Z HUK [OL OPNOLZ[ TVU[OS` H]LYHNL KL[LJ[LKH[`V\Y^H[LYZ`Z[LT  ;\YIPKP[`PZHTLHZ\YLVMJSV\KPULZZVM[OL^H[LY;\YIPKP[`PZ TVUP[VYLKILJH\ZLP[PZHNVVKPUKPJH[VYVM^H[LYX\HSP[`HUK JHUOPUKLY[OLLMMLJ[P]LULZZVMKPZPUMLJ[PVU

MYVTKPZ[YPI\[PVUZP[LZ  ;OPZ4*3MVY[\YIPKP[`PZVUPUKP]PK\HSYLHKPUNZ[HRLUL]LY`MV\Y OV\YZH[[OLZV\YJL^H[LYLU[Y`WVPU[=HS\LWYLZLU[LKPZ[OL OPNOLZ[PUKP]PK\HSZHTWSPUNYLZ\S[  (S[OV\NO *YV[VU ^H[LY HUK .YV\UK^H[LY ^LYL UV[ W\[ PU[V KPZ[YPI\[PVUPU +)7TVUP[VYPUNPZJVUK\J[LKH[ZWLJPÃ&#x201E;LK SVJH[PVUZ IHZLK VU [OL WV[LU[PHS KPZ[YPI\[PVU VM [OL KPMMLYLU[ ZV\YJL ^H[LYZ [V JVUZ\TLYZ  (Z Z\JO LHJO ZV\YJL OHZ H KLÃ&#x201E;ULK ZL[ VM TVUP[VYPUN ZP[LZ HUK [OL KH[H HYL YLWVY[LK I` ZLY]PJLHYLH  <:,7(4*3ZMVY/((HUK;;/4ZHYL[OLJHSJ\SH[LKX\HY[LYS` Y\UUPUN HUU\HS H]LYHNL  +H[H WYLZLU[LK HYL [OL YHUNL VM PUKP]PK\HS ZHTWSPUN YLZ\S[Z HUK [OL OPNOLZ[ X\HY[LYS` Y\UUPUN HUU\HSH]LYHNL  0MHZHTWSLHUKP[ZYLWLH[ZHTWSLHYLIV[OWVZP[P]LMVYJVSPMVYT IHJ[LYPHHUKVULVM[OL[^VZHTWSLZPZWVZP[P]LMVYE. coli[OLU HU4*3]PVSH[PVUOHZVJJ\YYLK

12

Abbreviations CFU/mL$JVSVU`MVYTPUN\UP[ZWLYTPSSPSP[LY mg/L$TPSSPNYHTZWLYSP[LYNYHTZWLYSP[LY MPN/100mL$TVZ[WYVIHISLU\TILYWLYTPSSPSP[LY NA$5V[(WWSPJHISL ND$3HIHUHS`ZPZPUKPJH[LZWHYHTL[LYPZUV[WYLZLU[ NDL$5V+LZPNUH[LK3PTP[ NTU$5LWOLSVTL[YPJ;\YIPKP[`<UP[Z µS/cm$TPJYVZPLTLUZWLYJLU[PTL[LY µg/L$TPJYVNYHTZWLYSP[LYNYHTZWLYSP[LY µmho/cm$TPJYVTOVZWLYJLU[PTL[LY pCi/L $WPJVJ\YPLZWLYSP[LY


Rondout Reservoir

Frequently Asked Questions At times, my drinking water looks โ€œmilkyโ€ when first taken from a faucet, but then clears up. Why?

(PYILJVTLZ[YHWWLKPU[OL^H[LYHZP[THRLZP[ZSVUN [YPWMYVT[OL\WZ[H[LYLZLY]VPYZ[V[OL*P[`(ZHYLZ\S[ I\IISLZ VM HPY JHU ZVTL[PTLZ JH\ZL ^H[LY [V HWWLHY JSV\K` VY TPSR` ;OPZ JVUKP[PVU PZ UV[ H W\ISPJ OLHS[O JVUJLYU;OLJSV\KPULZZPZ[LTWVYHY`HUKJSLHYZX\PJRS` HM[LY^H[LYPZKYH^UMYVT[OL[HWHUK[OLL_JLZZHPYPZ YLSLHZLK

At times I can detect chlorine odors in tap water. What can I do about it?

*OSVYPUL VKVYZ TH` IL TVYL UV[PJLHISL ^OLU [OL ^LH[OLY PZ ^HYTLY *OSVYPUL PZ H KPZPUMLJ[HU[ HUK PZ HKKLK[V[OL^H[LY[VRPSSNLYTZ;OLMVSSV^PUNHYL^H`Z `V\ JHU YLTV]L [OL JOSVYPUL HUK P[Z VKVY MYVT `V\Y KYPURPUN^H[LY! ย‹-PSS H WP[JOLY HUK SL[ P[ Z[HUK PU [OL YLMYPNLYH[VY V]LYUPNO[ ;OPZ PZ [OL TVZ[ LMMLJ[P]L ^H` [V HKKYLZZHJOSVYPULVKVYPUKYPURPUN^H[LY ย‹ -PSS H NSHZZ VY QHY ^P[O ^H[LY HUK SL[ P[ Z[HUK PU Z\USPNO[MVYTPU\[LZ ย‹7V\Y^H[LYMYVTVULJVU[HPULY[VHUV[OLYHIV\[ [PTLZ ย‹/LH[[OL^H[LY[VHIV\[KLNYLLZ-HOYLUOLP[ ย‹6UJL `V\ YLTV]L [OL JOSVYPUL IL Z\YL [V YLMYPNLYH[L[OL^H[LY[VSPTP[IHJ[LYPHSYLNYV^[O

Is New York Cityโ€™s water โ€œhardโ€? /HYKULZZPZHTLHZ\YLVMKPZZVS]LKJHSJP\THUK THNULZP\TPUKYPURPUN^H[LY;OLSLZZJHSJP\THUK THNULZP\TPU[OL^H[LYยธZVM[ยน^H[LY[OLLHZPLYP[PZ [VJYLH[LSH[OLYHUKZ\KZ+LWLUKPUN\WVUSVJH[PVU [OLOHYKULZZJHUILNYHPUNHSSVU*H*6MVY[OL

*H[ZRPSS+LSH^HYL:`Z[LTHUKNYHPUZNHSSVUMVY[OL *YV[VU:`Z[LT5L^@VYR*P[`ยปZ^H[LYPZWYLKVTPUHU[S` ยธZVM[ยน

Sometimes my water is a rusty brown color. What causes this?

)YV^U ^H[LY PZ JVTTVUS` HZZVJPH[LK ^P[O WS\TIPUN JVYYVZPVU WYVISLTZ PUZPKL I\PSKPUNZ HUK MYVT Y\Z[PUN OV[ ^H[LY OLH[LYZ 0M `V\ OH]L HU VUNVPUN WYVISLT ^P[OIYV^U^H[LYP[PZWYVIHIS`K\L[VY\Z[`WPWLZ0[PZ YLJVTTLUKLK[OH[`V\Y\U`V\Y^H[LY\U[PSJVSKMVY TPU\[LZPMP[OHZUV[ILLU\ZLKMVYHUL_[LUKLKWLYPVK VM [PTL ;OPZ ^PSS ร…\ZO [OL SPUL @V\ JHU H]VPK ^HZ[PUN ^H[LYI`JH[JOPUN`V\Yยธร…\ZOยน^H[LYPUHJVU[HPULYHUK \ZPUN P[ [V ^H[LY WSHU[Z VY MVY V[OLY W\YWVZLZ )YV^U ^H[LYJHUHSZVYLZ\S[MYVTZ[YLL[JVUZ[Y\J[PVUVY^H[LY THPU^VYRILPUNKVULPU`V\YHYLH(U`KPZ[\YIHUJL[V [OL THPU PUJS\KPUN [OL VWLUPUN VM H ร„YL O`KYHU[ JHU JH\ZLWPWLZLKPTLU[[VZOPM[YLZ\S[PUNPUIYV^U^H[LY ;OLZL[[SPUN[PTL^PSS]HY`KLWLUKPUNVU[OLZPaLVM[OL ^H[LYTHPU

Should I buy bottled water?

@V\KVUV[ULLK[VI\`IV[[SLK^H[LYMVYOLHS[OYLHZVUZ PU5L^@VYR*P[`ZPUJLV\Y^H[LYTLL[ZVYL_JLLKZHSS MLKLYHSHUKZ[H[LOLHS[OIHZLKKYPURPUN^H[LYZ[HUKHYKZ (SZV IV[[SLK ^H[LY JVZ[Z \W [V  [PTLZ TVYL WLY `LHY [OHU [OL *P[`ยปZ KYPURPUN ^H[LY >OLU W\YJOHZPUN IV[[SLK^H[LYJVUZ\TLYZZOV\SKSVVRMVY[OL5L^@VYR :[H[L/LHS[O+LWHY[TLU[5@:/+*,9; *VUZ\TLYZ JHU HJJLZZ HKKP[PVUHS PUMVYTH[PVU VU 5L^ @VYR :[H[L JLY[Pร„LKIV[[SLK^H[LYMHJPSP[PLZ^P[OPU[OLLU[PYL<UP[LK :[H[LZ[OH[JHUILZVSK^P[OPU5L^@VYR:[H[LH[www. health.state.ny.us/environmental/water/drinking/bulk_bottle/ bottled.htm  (Z HU HS[LYUH[P]L [V W\YJOHZPUN IV[[SLK ^H[LY\ZLHYL\ZHISLIV[[SLHUKร„SSP[^P[O5L^@VYR*P[` [HW^H[LY

Beginning June 2010, AMR Customers Can View Water Use Online at www.nyc.gov/dep 13


PRSRT STD US POSTAGE PAID  1\UJ[PVU)V\SL]HYK -S\ZOPUN5L^@VYR

City of New York Department of Environmental Protection

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Contact Us -VY H JVW` VM [OPZ YLWVY[ [V YLWVY[ \U\Z\HS ^H[LY JOHYHJ[LYPZ[PJZVY[VYLX\LZ[HMYLLRP[[V[LZ[MVYSLHK PU `V\Y KYPURPUN ^H[LY ]PZP[ www.nyc.gov/dep VY JHSS VYMYVTV\[ZPKL5@*JHSS5L^@VYR;;@ ZLY]PJLZHYLH]HPSHISLI`JHSSPUN -VY TVYL PUMVYTH[PVU VU Cryptosporidium HUK GiardiaWSLHZLJVU[HJ[[OL)\YLH\VM*VTT\UPJHISL +PZLHZLZVM[OL5L^@VYR*P[`+LWHY[TLU[VM/LHS[O HUK4LU[HS/`NPLULH[ VYJHSS ;VJVU[HJ[[OL5L^@VYR*P[`+LWHY[TLU[VM/LHS[O HUK4LU[HS/`NPLULHIV\[V[OLY^H[LYZ\WWS`OLHS[O YLSH[LK X\LZ[PVUZ JHSS  VY JHSS 5L^ @VYR :[H[L +LWHY[TLU[ VM /LHS[O )\YLH\ VM >H[LY :\WWS` 7YV[LJ[PVUH[ ;V YLWVY[ HU` WVSS\[PVU JYPTL VY [LYYVYPZT HJ[P]P[` VJJ\YYPUN IV[O PU*P[` HUK PU [OL ^H[LYZOLK JHSS /6:/,+ ;V ]PL^ [OPZ   :[H[LTLU[ HUUV\UJLTLU[Z VM W\ISPJ OLHYPUNZ VY V[OLY PUMVYTH[PVU ]PZP[ +,7»Z ^LIZP[LH[!

,Z[LYLWVY[LJVU[PLULPUMVYTHJP}UT\`PTWVY[HU[LZVIYLLS HN\HX\L\Z[LK[VTH/HNHX\LZLSH[YHK\aJHUVOHISLJVU HSN\PLUX\LSHLU[PLUKH *LYHWWVY[JVU[PLU[KLZPUMVYTH[PVUZPTWVY[HU[LZZ\Y]V[YL LH\WV[HISL;YHK\PZLaSLV\WHYSLaLUH]LJX\LSX\»\UX\P SLJVTWYLUKIPLU 8\LZ[V KVJ\TLU[V JVU[PLUL PUMVYTHaPVUP PTWVY[HU[P Z\SSH ]VZ[YHHJX\HWV[HIPSL;YHK\JL[LPSKVJ\TLU[VVYWHYSH[LUL JVUX\HSJ\UVJOLSVW\}JVTWYLUKLYL 9HW~ZHHNLULUM~THZ`VURPLUW~[HUHUWPSZV\KSV^»HW I^u H -u [YHK^PS WV\ V\ VZ^H WHSL HR `VU TV\U RP RVUWYHUUZHRPLRYPSHKHUS


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